• The fluid level rises as the temperature increases. The fluid must
be hot to ensure an accurate check.
• Be sure the fluid has reached normal operating temperature
(160º - 200º F/71º - 93º C). If a transmission temperature gauge
is not present, check the fluid level when the engine water
temperature gauge has stabilized and the transmission has been
operated under the load for at least one hour.
• Park the motorhome on a level surface and shift to N (Neutral).
Apply the parking brake and allow the engine to idle (500-800
rpm).
• After wiping the dipstick clean, check the fluid level. Safe operating
level is anywhere within the HOT RUN band on the dipstick.
• The width of the HOT RUN band is approximately one quart of
fluid at normal temperature range.
• If the level is not within this band, add or drain the fluid as
necessary to bring the level within the HOT RUN band.
• Be sure that the fluid level checks are consistent. Check the
level more than once. If the readings are not consistent check to
be sure that the transmission breather is clean and not clogged.
If the readings are still not consistent, contact the nearest Allison
distributor or dealer.
Low sulphur #2 diesel fuel or #1 and #2 commercial winter blend diesel
fuels are the most common commercially available and recommended for
use. The Cummins Engine Company Inc. recommends the use ASTM #2D
fuel. The use of #2 diesel fuel will result in optimum engine performance.
WARNING: Do not mix gasohol with diesel fuel. This
mixture can cause an explosion.
NOTE: Due to the precise tolerances of diesel injection
systems, it is extremely important that fuel be kept clean
and free of dirt or water. Dirt or water in the system can
cause severe damage to both the fuel pump and the fuel
injector. Fuel additives for lubricity are not recommended.
There are numerous diesel fuel additives to help remove
moisture from fuel, prevent microbe growth and to prevent
freeze-up during cold weather. Any fuel additives product
should show supporting data for performance and benefits.
Engine failures caused by incorrect fuel are not covered
under warranty.
Chassis Information
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
DIPLOMAT 10•297
FUEL
SYSTEM
Transmission Fluid
Levels - Hot Check
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